The Hunter 30200 HEPAtech Air Purifier features a Whisper-Quiet Fan that draws air into the unit without excessive noise. An advanced activated carbon prefilter reduces cooking, tobacco and pet odors while also capturing larger dust particles, lint and pet hair from dirty air. A permanently charged HEPAtech electret filter effectively captures 99.97% of all airborne particles as small as 0.1 microns in size that pass through the filter.